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web site inaccessible after edit of template 500: Internal Server Error

by
redCOR AG, robert rottermann
- 12/12/2014 13:09:18
Hi there,
we (my colleagues and me) are all new to odoo an therefore prone to make stupid mistakes.
now it looks as if we happened to have done exactly this.

How can we undo our action?
can I edit a template also in some backend/filesystem and not only in the "live" view?

thanks for your time
robert


After editing a template (unfortunately we can not tell which one exactly) we get the following error when attempting to access the web site:

500: Internal Server Error

Beim Verarbeiten des Templates ist ein Fehler aufgetreten website.layout.


Fehlerhinweis:

invalid syntax (, line 1)         
                 

Fehlerhinweis:

Could not evaluate expression '/web/session/logout?redirect=/'
Der Fehler tritt bei der Benutzung der Vorlage auf website.layout
                        und entdecken die folgende Einschränkung: /web/session/logout?redirect=/

Traceback (most recent call last):
  File "/opt/odoo/addons/website/models/ir_http.py", line 204, in _handle_exception
    response = super(ir_http, self)._handle_exception(exception)
  File "/opt/odoo/openerp/addons/base/ir/ir_http.py", line 100, in _handle_exception
    return request._handle_exception(exception)
  File "/opt/odoo/openerp/http.py", line 596, in _handle_exception
    return super(HttpRequest, self)._handle_exception(exception)
  File "/opt/odoo/openerp/http.py", line 1293, in get_response
    result.flatten()
  File "/opt/odoo/openerp/http.py", line 1166, in flatten
    self.response.append(self.render())
  File "/opt/odoo/openerp/http.py", line 1160, in render
    context=request.context)
  File "/opt/odoo/openerp/api.py", line 237, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/addons/website/models/ir_ui_view.py", line 171, in render
    return super(view, self).render(cr, uid, id_or_xml_id, values=values, engine=engine, context=context)
  File "/opt/odoo/openerp/api.py", line 237, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/addons/base/ir/ir_ui_view.py", line 1007, in render
    return self.pool[engine].render(cr, uid, id_or_xml_id, qcontext, loader=loader, context=context)
  File "/opt/odoo/openerp/api.py", line 237, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 253, in render
    return self.render_node(self.get_template(id_or_xml_id, qwebcontext), qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 292, in render_node
    result = self._render_tag[t_render](self, element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 435, in render_tag_call
    return self.render(cr, uid, template, d)
  File "/opt/odoo/openerp/api.py", line 237, in wrapper
    return old_api(self, *args, **kwargs)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 253, in render
    return self.render_node(self.get_template(id_or_xml_id, qwebcontext), qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 292, in render_node
    result = self._render_tag[t_render](self, element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 421, in render_tag_if
    return self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 294, in render_node
    result = self.render_element(element, template_attributes, generated_attributes, qwebcontext)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 315, in render_element
    g_inner.append(self.render_node(current_node, qwebcontext))
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 275, in render_node
    for att, val in attrs:
  File "/opt/odoo/addons/website/models/ir_qweb.py", line 61, in render_att_att
    for att, val in super(QWeb, self).render_att_att(element, attribute_name, attribute_value, qwebcontext):
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 351, in render_att_att
    return [(attribute_name[6:], self.eval(attribute_value, qwebcontext))]
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 197, in eval
    raise_qweb_exception(message="Could not evaluate expression %r" % expr, expression=expr, template=template)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 194, in eval
    return qwebcontext.safe_eval(expr)
  File "/opt/odoo/openerp/addons/base/ir/ir_qweb.py", line 80, in safe_eval
    return eval(expr, None, locals_dict, nocopy=True, locals_builtins=True)
  File "/opt/odoo/openerp/tools/safe_eval.py", line 311, in safe_eval
    c = test_expr(expr, _SAFE_OPCODES, mode=mode)
  File "/opt/odoo/openerp/tools/safe_eval.py", line 166, in test_expr
    code_obj = compile(expr, "", mode)
QWebException: invalid syntax (, line 1)